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Fiverr Pro
English
$
USD
I will build a custom saas backend and API
Djordje Vasic
About this gig
Most backends are built like a house of cards. They work perfectly... until you get actual traffic.
If you are building a SaaS, a web app, or an automation platform, your backend is your engine. You cannot afford to build it on shaky ground. I don't just write code. I build scalable, secure, and production-ready architectures that don't break when your business grows.
Whether you need a full SaaS infrastructure or a custom API integration, I deliver clean, type-safe code that actually makes sense.
What we can build together:
- Scalable Node.js & Next.js backend systems
- Bulletproof database design (PostgreSQL, MongoDB, Prisma)
- Seamless third-party integrations (Stripe, OpenAI, Webhooks)
- Secure authentication (NextAuth, Clerk, JWT)
No rigid corporate speak, no AI-generated filler. Just high-performance logic tailored to your specific project goals.
Not sure which plan fits your SaaS?
Don't guess. Drop me a message!
If you are undecided on which plan to choose, it's best to contact me first. We can easily jump on a quick call to map out exactly what your project needs.
Get to know Djordje Vasic
Djordje Vasic
Full Stack Web Developer
- FromSerbia
- Member sinceMay 2020
- Avg. response time1 hour
- Last delivery7 months
Languages
English, Serbian
I don’t just write code; I build high-performance digital assets. As a web developer and agency founder, I bridge the gap between complex logic and seamless UX.
Whether it’s a Next.js/React app, a custom Shopify store, or a WordPress solution, my focus is on speed, SEO, and clean architecture. No generic AI fluff - just sharp, functional code tailored to your goals.
Expertise:
- Full Stack Web Development
- Custom Shopify & WordPress
- Core Web Vitals & SEO
- API Integrations
Let’s skip the jargon and build something that actually scales. Message me.
My Portfolio
FAQ
Which tech stack do you specialize in?
I mainly work with Node.js, Next.js (Server Actions and API routes), Express, and databases like PostgreSQL and MongoDB using Prisma. I write clean TypeScript for type-safe, scalable, and maintainable code.
Do you offer frontend development as well?
Yes, I am a full-stack developer. While this specific gig is focused on heavy backend architecture and API logic, I can absolutely build the full application for you. Just shoot me a message and we can discuss a custom full-stack offer.
Can you integrate third-party APIs like Stripe or OpenAI?
Absolutely. I have extensive experience building automated workflows and connecting complex third-party APIs, payment gateways like Stripe, and AI features like OpenAI models into custom backends.
Will the code be easy for another developer to understand?
Yes. I write clean, structured code with proper documentation. No spaghetti code here. Your future team will be able to read, understand, and scale it without pulling their hair out.
How do you handle project deployment?
I can help you deploy your backend to platforms like Vercel, Railway, Render, or AWS, depending on your system requirements. If deployment is not included in your selected package, we can easily add it as a gig extra.
